DE7048151U - Wall box for discharging exhaust air from a building into the open - Google Patents

Description

Venair-TechniL J. Förg Lachen / Switzerland

Wall box for discharging exhaust air from a building into the open

The innovation concerns a wall box for discharging exhaust air from a building into the open air. This is intended to the air, especially kitchen fumes, emitted by a fan sucked in, conveyed out of the structure, but no backscatter of outside air into the interior of the Building? to allow, and also to prevent the ingress of rain.

Systems for the transport of exhaust air into the open, in which such wall boxes are used, usually have to be manufactured individually, as the local conditions change from case to case. These include limited space, especially boi retrofitting of such systems in existing buildings, Z ₀ as in older buildings. However, the main obstacle to the serial production of such systems must be from one building to another

7041181 Ut 74

varying wall thickness can be considered, which forces adapt the length of the exhaust air duct in each case to the existing masonry and determine its thickness precisely beforehand, as a subsequent length correction is too expensive Delays in the installation of the system can lead and occasionally even prove to be impossible.

Known exhaust air systems are therefore often constructed as simply as possible, especially when they are retrofitted, in order not to increase the cost of individual production too high. The sealing against the backflow of outside air into the interior of the building is mostly given little or no attention. The opening of the exhaust air duct on the outside wall of the building is also often made in the simplest way, in that the duct _{ends at this point without installing additional accessories, such as panels or wall boxes t} and is simply provided with a grille or sieve at the opening point. The consequence of this is that in cold weather the vapors contained in the exhaust air and condense, but also solid components such as soot, which are deposited at the point of the mouth, are washed down by the rain on the building's outer wall and contaminate it.

The aim of the innovation is to avoid these disadvantages and to create a wall box that can be produced in large numbers and is still suitable for a wide variety of buildings and for a wide variety of wall thicknesses.

Such a wall box has one for attachment to the Outside of the wall of the building certain, provided with openings for the exhaust air cover and a with him cooperating exhaust pipe, the length of which can be changed is.

In the accompanying drawing, an embodiment of the wall box according to the innovation is shown.

79 * 1111 Ul 7 »

The air sucked in by a fan (not shown) inside the structure or building enters an exhaust pipe a of the wall box. This tube is designed as a telescopic tube: in the illustration shown * !!! consists it consists of two tubes pushed one on top of the other, of which the outer slidably arranged on the inner i3t. Through this displaceability, the length of the exhaust pipe a and thus of the wall box can be effortlessly adapted to the respective wall thickness or the position of any outlet stub coming from the fan.

^A cover part b is provided for arrangement on the outside of the structure. This consists of a recycled plate with openings for the exhaust air. L. openings are designed as blinds, ie with obliquely downward pointing, extending approximately over the entire width of the plate and superimposed projections. This prevents rain or snow from penetrating the wall box, and even a strong wind can only make itself insignificantly noticeable behind the blinds. This part b also serves as a cover plate, which neatly covers irregular places, in particular an irregular wall opening and any damage that may arise on the masonry when it breaks.

On its underside, the cover part b is angled over its entire width, this angled section forms a drip bar c. This prevents at vapors that are contained in the exhaust air and condense in cold weather, but also solid components such as soot that adhere to the Knock down the edges of the passage openings, be washed down by the rain over the outer wall of the building and pollute them. The exhaust pipe a is provided with a movable non-return flap d at its outlet end. This is located inside a box-shaped housing that is between the exhaust pipe a and the cover part b is arranged. The flow cross-section of this housing is

larger than that of the exhaust pipe, creating a certain The air flow settles down. This will cause any noise from the exhaust air flowing out of the wall box significantly reduced, and any noise pollution, especially in densely built-up areas, avoided.

The backflow flap is advantageously suspended on its upper side so that it can rotate about a horizontal axis. When switching the exhaust fan is opened by the air flow and allows it to pass through; when switching off the fan it takes up a vertical position again under the effect of its own weight and thereby closes the exhaust air pipe a. So that we. in winter it effectively prevents cold air from entering the structure; can also be used in the case of negative pressure in the building or in the exhaust system opposite the outside, the air that has just been expelled does not flow back again.

Claims (7)

1. Wall box for the discharge of exhaust air from a building into the open air, characterized by one intended to be attached to the outside of the wall of the building with Passage openings for d.le exhaust air provided cover part and through an exhaust air pipe interacting with it, its Length is changeable. 2. Wall box according to claim 1, characterized in that the cover is formed ice louver and as the end aperture Zuji covering uiü-egelmäßiger locations on the wall outside in the region of & Mauerk least dientJ 3. Wall box according to claims 1 and 2, characterized in that the /.bdeckteil on its underside over its whole Width is angled away, this angled section forming a drip ledge .. 4. wall ^ branches according to claim 1, characterized in that the exhaust pipe is designed as a telescopic pipe. 5. Wall box räch claim 1, characterized in that a box-like housing between the outlet end of the exhaust pipe and the cover part is arranged, the flow cross-section of which is larger than that of the exhaust air pipe. 6. Wall box according to claims 1 and 5, characterized in that that at the mouth of the exhaust pipe in the housing a movable backflow flap is arranged if, t. 7. Wall box according to claim 6, characterized in that the back pressure flap on its top by a horizontal one Axis is rotatably suspended and in the absence of exhaust air flow under the effect of its own weight a 7641111 Assumes position in which it closes the exhaust pipe. 7t4HI1iti » Utility model 7 048 Protection claims 1. Wall box for the discharge of exhaust air from a building to the outside, with a designated for attachment to the outside of the wall of the building, with openings cover part provided for the exhaust air and with a telescopic exhaust pipe that interacts with it, the length of which can be changed, characterized in that the cover part (b) is designed as a blind part and as a Absclu. Blind for covering irregular areas on the outside of the wall in the area of the wall box. 2. Wall box according to claim 1, characterized in that the cover part (b) on its underside over its whole Width is angled away, v / obei this angled section forms a drip strip (c). 3. Ma \ .erkasten according to claim 1, characterized in that A box-like housing is arranged between the outlet end of the exhaust air pipe (a) and the cover part (b) whose flow cross-section is larger than that of the exhaust pipe (a). 4. Wall box according to claims 1 and J5> characterized in that a movable backflow flap (d) is arranged at the mouth of the exhaust pipe (a) in the housing, which is rotatably suspended on its upper side about a horizontal axis and in the absence of the exhaust air flow takes a position under the effect of its own weight in which it closes the exhaust air pipe (a).